123-3.(3x-5) = 3.42
<=>123 -9x+15 = 3.16
<=>138-9x = 48
<=>9x = 90
<=>x = 10
Vậy x = 10
123-3.(3x - 5)=3.16
123-3.(3x - 5)=48
3.(3x - 5) =123 - 48
3.(3x - 5)=75
3x - 5=75 : 3
3x - 5=25
3x=25 + 5
3x=30
x=30:3
x=10.
a) 5(x+35)=515
b) 12x-33=3².3³
c) 6.x-5=19
d) 4.(x-12)+9=17
e) 123-5.(x+4)=38
f) (3x-2⁴).7³=2.7⁴
A=1.22+2.32+3.42+...+2017.20182
Tìm x, biết:
a) ( 3x - 6 ) . 3 = 32
b) x - 7 = -5
c) 123 - 5 . ( x + 4 ) = 38
tìm x
123 - 5. ( x+4 ) = 38
( 3x - 2^4 ) . 7^3 = 2 . 7^4
a, 123 - 5 . ( x + 4 ) = 38
b, ( 3x - 24 ) . 73 = 2 . 74
c, ( x : 3 - 4 ) . 5 = 15
Tính : Q = 1.22 + 2.32 + 3.42 + …+ 19. 202
[ 8 x - 120 ÷ 4 ] ×3^3=3^6
123-5 (x+4)=38
(3x- 2^4)×7^3=2×7^4
1)(2x+1)-7=14
2)15-(3x-1)+11=59
3)70-5(x-3)=45
4)412-15.(nhân)(27-x)=97
5)2008(2x+7)=112
6)126-17(3x-5)=7
7)(2600+6400)-3x=1200
8)123-5(x+4)=38
GIÚP MIK GIẢI NHÉ !!! @.@
câu 1:(-25)(75-45)-75.(45-25)
câu 2: (123+345)+(456-123)-[2456-(-345)]
câu 3: -2020-(28-2020)-192
bài 2 : tìm x
a) (27-x)+(15+x)=x-24
b)|x+15|=|3x-5|
c)(x+3)(x+5)<0
d)3x+4y-xy=16
bài 3 Không quy đồng mẫu hãy tính tổng sau
H=5/2.1+4/1.11+3/11.2+1/2.15+13/15.4
